The geologic time scale is based on

The geological time scale is based on the major events that has taken place on earth in the geological past. This includes the great mass extinction events, appearance and extinction of specific living organisms, abundance of oxygen and depletion of oxygen in the atmosphere and many others. These events are arranged in a sequential order, right after the formation of the earth about 4.6 billion years back. These events are dated with the help of radiometric dating that gives an absolute age and also these data helped in the construction of the past events with respect to time.

This geological time scale is commonly used by the geologists.

it would be the percentage of food eaten by the flock

i remember doing this lab

it has to be understood that the sea water contains a huge amount of sodium and chlorine ions and if they enter the cell of the atlantic cod fish, the cell will shrivel and the fish will die. to avoid such a condition, the fish uses active transport for the purpose of removing the ions against the gradient.

explanation:

the atlantic cod is not a maritime osmoconformer. its native application of salts is less than that of the seawater it lives in. it is continually falling water from the gills to the ocean via osmosis.

countering that, the fish is going to be swallowing seawater. but since its internal collection of salts is lower than seawater, the fish will want to go free of excess salt, and since that's going upon a gradient, then active transport, requiring energy, must be used to pump out the salt. much marine fish use the organs to filter out the salt and these fish discharge very straight urine.